I just left about a half hour ago and it was fine then. This happened to be two days ago and then when I came home I was still not able to log-in but after a quick computer restart I went right in. This may not be the problem at all me friend but I just thought I would add to this thread.
My Game froze at the Loading screen.. still says "LOADING" with the starfleet insigna screen. been saying that for 3 hours now.. i just patched the game, im gonna try defraging the game folder and see if it works.